pancakes brushless vs. classic motors?

[Bertzilla]

what is the general difference between classic brushless motors and a pancake ones? Why pancakes are often mounted in multicopters? Are they vibeless? stronger? lighter? more effective. Cannot find a brief answer. If someone could help pls... Brtz.

[SimonS]

Pancake is high torque and usually lower kv.  Classic is lower torque and higher kv.
As always there are exceptions to both!